import { BaseAnalyticsEvent } from '../types/events.ts';
import { Analytics } from './Analytics.ts';
export interface GA4Config {
    measurementId: string;
}
export declare class Ga extends Analytics<BaseAnalyticsEvent> {
    protected measurementId: string;
    private static instance;
    constructor(config: GA4Config);
    static getInstance(config: GA4Config): Ga;
    protected initialize(): void;
    protected sendAnalyticsEvent(customEvent: BaseAnalyticsEvent): number;
}